Sorry horsewithnoname, been on a nice long holiday.
If you mean that the horse is a dual acceptor just for the particular day you are looking at (& not any other race in the near future), then the answer is no.

That would work for me.

No worries. Thanks.

Hi Reinz
That 247 race site is very good.

They have a thingo there, rating the horse in "Top 3%."

Do you know what that means?

The rating pts, of the "Top 3%" seem to be very accurate.

Starting point for a simple system:
Look at each runner last five starts
If they started at 10/1 or less, at two of those starts or more & are 20/1 or over today, take a closer look

just noticed that Warrnambool r6n11 winner at big odds last Tuesday fitted your criteria for a closer look
interesting ;)

Adding third-up from a spell works for me.

I find systems don't work. Fluctuations kill them.
They will work fine for a few days then completely fail.

Works for me.

Okay not many winners pay $20+.
How many non winning horses per race do you back to find the winner " that works for you"?
This Saturday at Sandown there were no $20 winners.
Newcastle there were no $20+ winners.
Doomben no $20+ winners
Ascot might have been 2 qualifiers?

The system might have merit if you stick to female only, maidens and 1,000m races.